I haven't had the previous reviewer's issues with the cartridges becoming
unseated, but I find that the tabs don't click into place as easily as I would
like. I also own a Zebra Prefill 3-color body and those tabs are better, but I
like the Style Fit ink better. It's a very minor annoyance - just push the tab
in a little, then push down until it clicks. The body itself is on the thinner
side for a 3-color pen in my opinion - truthfully, it's thinner than my Prefill
or my Alpha Gel Kuru Toga 0.5mm pencil. It isn't uncomfortable, though.

The color of the pen body is a really pretty teal, which I love, but there's a
lot of rattling when I load the 0.28 Style-Fit cartridges into the body and on
the whole it feels a little flimsy. I've had a lot of problems with the
cartridges becoming unseated and falling forward into the front of the pen while
I'm writing, making me unscrew the cap and push the cartridges back into the
slots before I can keep writing. I'm going to stick to the Style-Fit single pen
bodies, because the cartridges themselves are great.